public class Dog {

    private String color;
    private String breed;

    public Dog() {}


    public Dog(String color) {
        this.color = color;
    }

    public Dog(String color, String breed) {
        this(color);
        this.breed = breed;
    }

    public void eat() {
        System.out.println(color + "的" + breed + "正在啃骨头...");
    }

    public void lookHouse() {
        System.out.println(color + "的" + breed + "正在看家...");
    }
}
